2022-07

CBX

FCR-screw adjustment and AS Uotani SP2 dial tuning 22/0729...

I looked at the cold startability of the engine and tried adjusting AS and PS. I had already decided on the general tuning the other day, so I didn't have to spend any particular time on it, so it was more of a confirmation process. I feel that it is better to open the PS for starting performance. I tried tightening and opening it, but in the end I left it at the default tuning and moved the idle stop screw a little higher.
       
カテゴリCBXFCR
タグASAS-Uotani-SP2CBXFCRFCR-BeginnersPS
FCR

FCR tuning - AS and PS adjustment during test run22/07/28...

If you try to improve the starting performance, the PS will tend to open. Since it is a racing cab, you may not need to worry too much. Either way, I currently prefer a richer shade, so I'll see how it goes tomorrow morning. I'm thinking about various things, such as tightening the PS a little more and raising the stop screw a little.
       
カテゴリCBXFCR
タグASCBXFCRPS
FCR

FCR-JN clip stage number change - 2nd time today - 22/07/27...

JNを触り始めて長かったです。最初FCRを触り始めた時はテーパー角と切り上がりは触らない範囲で楽しめればなと考えていました。1度触ってしまえば、理屈も随分と分かったつもりになれました。現代では空燃比計があるから少しはましですけど、昔であればカスタムショップでノウハウを持っていたりジェット類を一通り揃えている状態でないとセッティングは難しい状況でした。
       
カテゴリCBXFCR
タグAScabtuningCBXFCRFCR-BeginnersJNPS
FCR

FCR-Test run-Mesh jacket is pretty good22/07/27...

It's a cool mesh jacket when you look at it alone, but I feel like it doesn't go well with the CBX. It may be suitable for bright tricolor replicas such as NSR. Since I have already purchased it, I will be spending the summer with a mesh jacket for the time being.
       
カテゴリCBXFCR
タグASCBXFCRFCR-BeginnersPSSJ
FCR

FCR tuning-PS pilot screw changes22/07/25...

The other day, I found out the scope of responsibility for PS Pilot Screw! That's what I was feeling, so I went for a test drive and checked the air-fuel ratio while turning the PS. About the throttle opening - It's around 15 when fully closed and around 12.5 when it's around 1/16-1/8. Is around ①14 good when fully closed and idling? ②Is around 12.5 good? That's the idea.
       
カテゴリCBXFCR
タグCBXFCRFCR-BeginnersPS
FCR

Comparison of idle port and slow port of FCR carburetor...

I hadn't been aware of it until now, but this is a story that makes me feel like I understand the difference in air-fuel ratio between the idle port and the slow port. There was an incident where I was able to see the difference between fully closing the throttle and opening it slightly to about 1/16, so I will write about it. First of all, I would like to disclaim that I am a programmer by trade and not a motorcycle shop staff member, so please understand that I may contain incorrect information or expressions.
       
カテゴリCBXFCRMaintenanceManual
タグCBXFCRFCR-BeginnersYouTube
FCR

In the case of a racing carburetor such as FCR, can it be run in the rain with a funnel specification? Should I do it?...

I hate driving in the rain. Working motorcycles and commuting motorcycles, including Cubs. Even large motorcycles shipped from the manufacturer are driven in the rain. Such motorcycles do not have any problems. After thinking about it for a while, I realized something.
       
カテゴリCBXFCR
タグCBXColumnFCR
FCR

FCR tuning - Use BITO's default jet needle. I did a test drive with a higher cut-off....

I purchased a slightly special needle, 90FXM, from BITO. What's special about it is that it's a count that doesn't see many upswings. In fact, it is not in the standard stock lineup. This is the needle attached to the current initial turning of BITO's CBX FCR.
       
カテゴリCBXFCR
タグCBXFCRFCR-BeginnersJN
FCR

Comparison of FCR-jet needle cut-up. Let's take a look at the thickness of the small standard 90FXM and 90FTM....

I received the JN Jet Needle 90FXM from BITO. I have JN on hand with different tapers and different cut ups. I feel more and more like I'm buying it for experimenting rather than tuning it up.
       
カテゴリCBXFCRManual
タグCBXFCRFCR-BeginnersJN
CBX

tuning of FCR - If the small jet needle is F taper, you cannot choose the cut-up. Round up comparison...

I can't help but feel like the large is basically telling you not to use anything other than the E taper. Small has more overall numbers than large, but [E] taper still has more options. With F-taper, you cannot choose the cut-up unless you order it in units of 20 pieces.
       
カテゴリCBXFCRManual
タグCBXColumnFCRFCR-BeginnersJN